Phonons in SrCuO2 single crystals

被引：0

作者：

Milicic, S.N. ^{[1
]}

Popovic, Z.V. ^{[1
]}

Konstantinovic, M.J. ^{[1
]}

Vietkine, A. ^{[1
]}

Revcolevschi, A. ^{[1
]}

机构：

[1] Inst of Physics, Belgrade, Yugoslavia

来源：

Diffusion and Defect Data Pt.B: Solid State Phenomena | 1998年 / 61-62卷

关键词：

Strontium copper oxide;

D O I：

暂无

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学科分类号：

摘要：

We measured the polarized far-infrared reflectivity and Raman scattering spectra of SrCuO2 single crystals. The TO and LO frequencies of the B1u and B3u modes are determined by the numerical fitting procedure of the infrared reflectivity data. The Raman spectra were measured at different temperatures using several laser line energies. For polarization parallel to the c-axis they consists of Raman-allowed Ag symmetry modes and B1u LO infrared-active (Raman-forbidden) modes of the first and higher order as well as their combinations. It is shown that Raman allowed modes (Ag symmetry modes) are resonantly enhanced when laser energy is close to the fundamental energy gap value (E0) while Raman-forbidden (IR-active modes) resonate strongly for the laser line energies close to the electronic transition of higher energy gaps.

引用

页码：305 / 308